Granted Patent
Utility
US 4,344,734 · App. 06/152,762
Self-leveling bucket linkage
Inventor:
John F. Shumaker
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: May 23, 1980
Inventor
John F. Shumaker
Assignee (at issue)
J. I. Case Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.